Hoisting and dumping mechanism.



e. W000. HOISTING AND DUMPING MECHANISM.

APPLICATION FILED DEC.B, I916.

, Patented J 1113 9, 1918.

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H M O a I g f sembling of the parts is facilitated. It is construction of the PATENT @FFliQE.

GARFIELD A. WOOD, 033 DETROIT, MICHIGAN.

HOIS'IING AND DUMPING MECHANISM.

Application filed December 8, 1916.

a citizen of the United States, and residing.

at Detroit, in the county of Wayne and State of Michigan, have invented a new and Improved Hoisting and Dumping Mechanism, of which the following is a specification.

It is common practice to dump the contents of truck bodies by lifting the front end upwardly about pivots near the rear end of the chassis by means of hydraulic hoisting means. A convenient source from which to operate the hoisting means is the propeller shaft; but, on account of the fact that the heavy loads and shocks incident to hoisting are borne on the side frames and independently of the propeller shaft, the deflection of the former is not transmitted to the latter. Again, it is desirable to provide for slight inaccuracies in the construction of either hoists or chassis (often made by different manufacturers), whereby asfurther desirable to avoid the liability of leakage which results from independently supporting the pumping and hoisting elements of which the hoisting means as a whole is made up. It is also desirable to provide controlling means for the pump so arranged that if the control lever is arred loose from normal or inoperative position, the weight of the parts is applied to the power receivingelement in such manner as to tend to hold'the latter away from power receiving position. With these ends in view the present invention consists in a supplemental frame or support which extends. across between the side bars of the chassis at about the upper level thereof, said supplemental frame depending to and supporting substantially the level of the propeller shaft a pump and mechanism, in

cluding a sprocket chain and clutch gear, whereby the pump is riven. it also consists in details of construction shown, described and claimed.

Certar neral combinations of eleme t and net specific atures relevant 1 ---echanism shown claimed herein claimed co-pendi ig applications ror Letters namelyz- Augus Specification of Letters Patent.

Patented July 9, 1918.

Serial N0. 135,797.

and the division thereof, S. N. 115,957, filed August 21, 1916;

S. N. 14,479, filed March 15. 1915, and

the division thereof, S. -N. 117,235, filed,

August 28, 1916. I

The present invention is in the nature of an improvement on that indicated in my application for United States Letters Patent Serial Number 117,236, filed August 28,1916.

In the drawings, Figure l is a fragmentary side view showing a preferred embodiment of the invention. Fig. 2 is a fragmentary view taken from the right side of Fig. 1. Fig. 3 is a fragmentary section on the line 33 of Fig. 2. Fig. 4 is a section on the line H of F ig. 3.

1 indicates the side bars of the vehicle near the rear end of which are secured brackets 2 bearing pivots 3 about which the body 4 may be swung vertically for dumping purposes. The body, may include the longitudinal frame pieces 5 so arranged as to rest, when in lowered position, either on the side bars or on special chairs (not shown) carried thereby. This general construction is well. known.

Extending transversely across the side bars at a point just forward of the front end of the body and bolted or otherwise secured thereto are cross bars 8 (preferably angle-irons having their horizontal flanges facing each other,) upon which rests the flanged base 9 of a hoisting cylinder 10, the piston rod 11 of which, through cross bar 12, sheaves 13., cables 14, equalizing bar 15, shackle 16 and arms 17 secured to the body, serves to elevate the front end of the latter. The cylinder has secured to its ,upper end an expansion chamber or tank 19 that may be in free communication with the interior end of the cylinder below the iston by a delivery pipe 25. The flow of iquid through the pump is controlled by v3334 through -the bearing. The gear is perforated longitudinally and serves as a guide for clutch pins 36 which are carried by a longitudinally movable clutch member that has a circumferential groove 39 in which are received pins 40 on the yoke arms 41. The latter are rigid with a pivot shaft 42, one end of which is carried in the lower end of the member 22, the other end being supported in an angleabar 43 which depends from the bar 8 on the side of the propeller shaft opposite the member22. An arm 44 rigid with the shaft 42 projects rearwardly therefrom and is pivotally connected to a link 45 that leads to a pivoted hand lever 46 preferably mounted on the expansion chamber '19nieans, not shown, tends to retain the hand lever in the position indicated in Fig. 2 butit will be seen that in 1 case it becomes loosened (as might occur is positioned therein.

in traveling over rough roads) the weight of the link is applied to the arm 44 in a manner such as-to tend to'hold the pins 36 withdrawn into the gear 33 or at the limit of'their rearward movement, whereby they ,are prevented from accidentally engaging the clutch ring mentioned below. The pins 36', when 'thrown forwardly, project from .the face of the sprocket gear 33 in position to engage teeth 48 on a floating clutch ring 49, the latter being grooved to receive pins 50 whichextend radially inward from the divided member 51 that is held rigid with the shaft 21 by clamping bolts 52. Radial springs 53 may be interposed between the ring and the; member -51.

It will be observed that the lower end of the transverse flange of the angle bar 22 is cut away to form a notch and that e pump The pump is therefore located close to the bearing 35, being spaced therefrom-only the thickness of the plate-like longitudinal flange of the angle bar. A very compact and stiff construction is thus secured without encroaching on the spaceusually required for other elements of the truck.

The openings in the clutch member 38, the

gear 33 34 and ring 49, through which the propeller shaft passes are preferably of con side'rably larger cross sectional dimension than the shaft itself, consequently deflection of the supplemental frame 8, due to the heavy loads carried thereby in hoisting, may, 7.

.for lack of alinement of the shaft and ring in one direction; lack of alinement in a direction at right angles thereto is compensated for by movement of the clutch ring longitudinally of the'radial pins 50. The springs 53 prevent the clutch ring from shifting on the pins 50 when the clutch members are not engaged, and also prevent ratt ing.

By this construction it will be observed that the pump and clutch mechanism are so located that all relative deflection is avoided and that the chain 32 is very short; also that there is substantially no relative deflection between the pump cylinder and the pump, which avoids any undue tendency of the pipes 24 and 25 to become loosened at their points of connection.

The details of construction may obviously be varied considerably without departing from the spirit of the invention.

1. In combination with the side bars and 2. In combination with the side bars and a longitudinally extending shaft of a motor vehicle, a cross bar construction extending across" between the side bars, said cross bar. construction comprisinga depending element including a thin plate arranged in a longitudinal plane of the vehicle, a pump mounted on said plate on the side thereof mostremote from the shaft, and a clutch member mounted on the said plate on the side thereof nearest the shaft, means for driving the pump from the clutch member, and means for driving the clutch member from the shaft. I Y

3. In combination with the side bars and the longitudinally extending propeller shaft of a motor vehicle, a supplemental support extending across between the side bars and depending to a point at substantially the level of the corresponding portion of the propeller shaft, a hoisting cylinder on the supplemental support, a driving member secured to the shaft, a pump and a pump driving gear supported on the depending portion. of the supplemental support, said pump including a casing separate from the 'depend notch, and means for driving the pump ing through the gear, means for directing liquid from the pump to the cylinder and from the cylinder to the pump, and clutch means for connecting the pumpdriving gear.

to the drivin member atwilhfs'aid means allowing 'de ection of the, supplemental frame without inducing bending stressesin the shaft.

4. In combination with theside bars and .a longitudinally extending torvehicle, a pump support carried by the- .bars and including a substantially vertically arranged angle iron having one flange in a,

longitudinal plane of the vehicle, the lower portion of the other flange being removed to form a notch, a pump mounted in the from the shaft.

. 6. ,[11 combination with the longitudinally extending propeller shaft of a motor vehicle, a cross bar extending the side bars and across between the side bars, a support rigid with the cross bar and depending therefrom .on one side of the propeller shaft, a pump,

carried by the support, a pump driving member also carried by said support, another support depending from the cross bar on the side of the propeller shaft opposite the first mentioned support, means including a clutch for driving the pump driving member from the shaft, and clutch controlling means carried jointly by the two supports.

7. In combination with the side-bars and the longitudinally extendingpropeller shaft of a motor vehicle,

means rigid with the cross bar and depending therefrom. on opposite sides of the propeller shaft,a pump and .a pump driving member carried by said supporting means, and clutchmeans, including a yoke pivoted to swing ab'outga horizontal axis and mount ed in the depending-supporting means on shaft at-Will.

8. In combination with the side bars and the longitudinally extending propeller shaft of a motor vehicle, a cross bar extending across between the side bars, supporting means rigid withthe cross-bar and depending therefrom on opposite sides of the propeller shaft, a pump and a pump driving member carried by said supporting means, means for driving saidpump driving member from the shaft atlwill, and means for controlling the last mentioned'means so ar'- ranged that the weight-of the parts tends to hold said means'o'ut of pump driving relation.

9. In combination with the side barsand a cross bar extending across between the side bars, supporting opposite sides of the propeller shaft, for driving said pump driving member from the.

the longitudinally extending propeller shaft of a motor vehicle, a cross-bar construction extending across between'the sidebars and depending therefrom,,=a clutch construction encircling the shaft and comprising a member ca'rried by the shaft and another member carried by the cross bar construction considerably below the upper'edges of the side .bars, a pump supported by the? cross bar construction and spaced considerably below the upper edges of the sidei-liam, and

means for driving the-pump fromf'the'flast mentioned clutch member. I

GARFIELD A. ween. 

